In investigating the competencies needed by secondary school teachers, the comparative effectiveness of three occupational (job) analysis techniques was examined: Critical Incident, DACUM, and Information Search. The study was designed to compare these three techniques on their effectiveness in generating Phase 2 data (list of competencies, after Herman, 1987). This involved controlling for researcher time allocated to each technique, having the same category of respondents for each technique, and devising a 'validated" inventory of competencies against which the OA techniques can be compared. Using